Thin-flap laser in situ keratomileusis with femtosecond-laser technology

Kymionis, George D.; Kontadakis, Georgios A.; Grentzelos, Michael A.; Panagopoulou, Sophia I; Stojanovic, Nela; Kankariya, Vardhaman P.; Henderson, Bonnie An; Pallikaris, Ioannis G.

doi:10.1016/j.jcrs.2013.03.024

Cited by 13 publications

(10 citation statements)

References 27 publications

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“…Excellent laser-assisted in situ keratomileusis (LASIK) outcomes require safe, predictable, and reproducible flap parameters. 1 , 2 Excessively thick flaps may predispose patients to biomechanical instability and possible ectasia. Femtosecond-LASIK flaps that are too thin may be prone to gas breakthrough or lifting complications, such as flap tears, striae, or buttonhole formation.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Alcon WaveLight<sup>®</sup> EX500 optical pachymetry during LASIK

Mifflin

Mortensen

Betts

et al. 2017

OPTH

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PurposeTo study the accuracy and reliability of optical pachymetry using the Alcon WaveLight EX500 during laser-assisted in situ keratomileusis (LASIK).Materials and methodsThis was a retrospective chart review of 90 eyes from 45 patients who had undergone LASIK (mean age 35.2±8.2 years; 19 males, 26 females). The WaveLight FS200 femtosecond laser was programmed to cut LASIK flaps at a desired depth of 120 μm. Optical low-coherence reflectometry (WaveLight EX500) was used to measure central corneal thickness prior to lifting the flap, and the residual stromal bed immediately after excimer ablation. Flap thickness (FT) was calculated using simple subtraction. Optical coherence tomography (OCT) was used to measure central corneal thickness, flap thickness, and residual stromal bed in the postoperative period and the results compared to intraoperative measurements.ResultsMean programmed FS200 FT was 119 μm. Mean FT using EX500 optical pachymetry was 109 μm. The difference between FS200- programmed and EX500-measured FT was 9 μm (P<0.001). There was also a significant difference between the EX500 and OCT FT (109 μm vs 119 μm, respectively; P<0.001).ConclusionFT values calculated using intraoperative EX500 optical pachymetry were significantly lower than programmed FS200 values or OCT measurements.

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Section: Introductionmentioning

confidence: 99%

Accuracy of Alcon WaveLight<sup>®</sup> EX500 optical pachymetry during LASIK

Mifflin

Mortensen

Betts

et al. 2017

OPTH

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“…For Visumax, 28 , 40 the difference from the target was 10.6 μm more than intended. Wavelight FS200 29 , 30 produced corneal flaps that were close to the intended value (difference from the target flap thickness was +0.03 μm). The average SD for IntraLase FS 15 and 30 kHz was 15.5 and 13.8 μm, respectively.…”

Section: Resultsmentioning

confidence: 70%

“…FEMTO LDV 26 , 27 had the average predictability of 89.4%. For Visumax 18 , 24 and Wavelight FS200, 29 , 30 the average predictabilities were 87.1% and 90.5%, respectively.…”

Section: Resultsmentioning

confidence: 97%

Femtosecond lasers for laser in situ keratomileusis: a systematic review and meta-analysis

Huhtala¹,

Pietilä²,

Mäkinen³

et al. 2016

OPTH

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PurposeThe aim of this study was to review and meta-analyze whether there are differences between reported femtosecond (FS) lasers for laser-assisted in situ keratomileusis (LASIK) in terms of efficacy, predictability, and safety as primary outcomes and corneal flap thickness measurements and pre- and postoperative complications as secondary outcomes.MethodsA comprehensive literature search of PubMed, Science Direct, Scopus, and Cochrane CENTRAL Trials Library databases was conducted to identify the relevant prospective randomized controlled trials of FS lasers for LASIK. Thirty-one articles describing a total of 5,404 eyes were included.ResultsBased on efficacy, IntraLase FS 10 and 30 kHz gave the best results. Based on predictability and safety, there were no differences between various FS lasers. FEMTO LDV and IntraLase FS 60 kHz produced the most accurate flap thicknesses. IntraLase and Wavelight SF200 had the fewest intraoperative complications. IntraLase, Visumax, and Wavelight FS200 had the most seldom postoperative complications.ConclusionThere were dissimilarities between different FS lasers based on efficacy and intraoperative and postoperative complications. All FS lasers were predictable and safe for making corneal flaps in LASIK.

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“…Результаты проведенного исследования находятся в диапазоне данных, получен-ных другими авторами с использованием зарубежных эксимер-лазерных установок [9][10][11][12][13].…”

Section: Discussionunclassified

Comparative Analysis of the Efficiency, Safety, Predictability of Wavefront-Guided and Conventional FemtoLASIK Procedures in Low to Moderate Myopia

Doga¹,

Mushkova²,

Каримова³

et al. 2018

Ophthalmology in Russia

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Purpose: to evaluate the effectiveness, safety, and predictability of the wavefront-guided FemtoLASIK using the Platoscan computer program and data from the KR-1W aberrometer, in comparison with the conventional algorithm FemtoLASIK in patients with low to moderate myopia.Patients and methods. There were 62 eyes of 62 patients with low to moderate myopia who had undergone FemtoLASIK procedure using an excimer laser ‘Microscan Visum” (Russia) and a femtosecond laser Femto LDV Z6 (Switzerland) in the study. In the “Wavefront” group which included 31 eyes with a mean spherical equivalent (SE) -=3,32 ± 1,23 D (M ± SD) was performed a wavefront-guided Femtosecond LASIK using aberrometer KR-1W (Japan) and a program for calculating the operation’s parameters “Platoscan” (Russia). “Standard” group included 31 eyes with an average SE –3.51 ± 1.21 D (M ± SD), who received the conventional FemtoLASIK. The “Wavefront” and “Standard” groups were comparable in terms of pre-operative data (age, sex, corneal curvature, central thickness of the cornea, sphere, cylinder, SE) (p > 0.05). All patients underwent complete ophthalmological examination before refractive laser surgery, and also patients were examined on the 1st day and 1 month after FemtoLASIK.Results. One month postoperatively, in the “Wavefront” group the UDVA 1.0 or better (20/20 or better by Snellen) was achieved in 93.5%, in the “Standard” group — in 96,8% (p > 0.05). There wasn’t observed a loss of the CDVA lines in both groups. In the “Wavefront” group, gain of one or more lines of the CDVA was in 38.7%, in the “Standard” group — in 12.9% (p = 0.04, Fisher’s exact test). In the “Wavefront” group the predictability of targeted refraction within ±0.5 D was in 93.5%, within ±1.0 D — in 100%, in the “Standard” group — in 90,3 and 100%, respectively (p > 0.05). The efficiency index in the “Wavefront” group was 1.00 (1.00; 1.20) (Me (Q25; Q75)), in the “Standard” group — 1.00 (1.00; 1,00) (Me (Q25; Q75)) (p > 0.05). The safety index in the “Wavefront” group was 1.00 (1.00; 1.20) (Me (Q25; Q75)), in the “Standard” group — 1.00 (1.00; 1,00) (Me (Q25; Q75)) (p > 0.05).Conclusions. The FemtoLASIK procedure, performed according to the conventional and wavefront-guided algorithms using the “Platoscan” computer program and data from the KR-1W aberrometer, is an effective, safe and predictable method for correcting low to moderate myopia, there is no statistically significant difference between two algorithms (p > 0.05).

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Thin-flap laser in situ keratomileusis with femtosecond-laser technology

Abstract: No significant complications occurred after treatment with this new femtosecond-laser platform in thin-flap LASIK. Clinical (visual and refractive) results were satisfactory in terms of safety, predictability, and stability.

Cited by 13 publications

References 27 publications

Accuracy of Alcon WaveLight<sup>®</sup> EX500 optical pachymetry during LASIK

Accuracy of Alcon WaveLight<sup>®</sup> EX500 optical pachymetry during LASIK

Femtosecond lasers for laser in situ keratomileusis: a systematic review and meta-analysis

Comparative Analysis of the Efficiency, Safety, Predictability of Wavefront-Guided and Conventional FemtoLASIK Procedures in Low to Moderate Myopia

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Thin-flap laser in situ keratomileusis with femtosecond-laser technology

Abstract: No significant complications occurred after treatment with this new femtosecond-laser platform in thin-flap LASIK. Clinical (visual and refractive) results were satisfactory in terms of safety, predictability, and stability.

Cited by 13 publications

References 27 publications

Accuracy of Alcon WaveLight<sup>&reg;</sup> EX500 optical pachymetry during LASIK

Accuracy of Alcon WaveLight<sup>&reg;</sup> EX500 optical pachymetry during LASIK

Femtosecond lasers for laser in situ keratomileusis: a systematic review and meta-analysis

Comparative Analysis of the Efficiency, Safety, Predictability of Wavefront-Guided and Conventional FemtoLASIK Procedures in Low to Moderate Myopia

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Product

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Accuracy of Alcon WaveLight<sup>®</sup> EX500 optical pachymetry during LASIK

Accuracy of Alcon WaveLight<sup>®</sup> EX500 optical pachymetry during LASIK